Installation; Horizontal Thru-Wall Stack Vent Termination - CleaverBrooks CFC-500 Operation, Service And Parts Manual

1. Installation

These installations utilize the boiler mounted blower to draw
combustion air from outside and vent combustion gases to the
outside.
The sealed combustion air vent cap is not considered in the overall
length of the venting system.
Care must be taken during assembly that all joints are sealed
properly and are airtight for both the combustion air intake and the
exhaust stack piping system.
The stack vent must be installed to prevent the potential
accumulation of condensate in the stack pipes. It is recommended
that:
• The vent be installed with a slight downward slope of not more than 1/4"
per foot of horizontal run to the stack terminal.
• The stack vent is to be insulated through the length of the horizontal run.
For appliances installed in extreme cold climate, it is recommended
that:
• The stack vent be installed with a slight upward slope of not more than
1/4" per foot of horizontal run to the vent terminal. In this case, an
approved condensate trap must be installed per applicable codes.
• The stack vent is to be insulated through the length of the horizontal run.

2. Horizontal Thru-Wall Stack Vent Termination

The stack vent cap MUST be mounted on the exterior of the
building. The stack vent cap cannot be installed in a well or below
grade. The stack vent cap must be installed at least one (I) foot
above ground level and above normal snow levels.
Multiple stack vent caps should be installed in the same horizontal
plane with a three (3) foot clearance from the side of one stack cap
to the side of the adjacent stack vent cap(s).
Combustion air supplied from outside must be free of particulate
and chemical contaminants. To avoid a blocked flue condition, keep
all the vent caps clear of snow, ice, leaves, debris, etc.
No substitutions of flue pipe or vent cap material are allowed. Such
substitutions would jeopardize the safety and health of inhabitants.
Part No. 750-263
Warning
!
Section 3 — Stack and Intake Vent Sizing and Installation
Multiple direct stack vent caps
MUST NOT be installed with one
combustion air inlet directly above
a stack vent cap. This vertical
spacing would allow the flue
products from the stack vent cap
to be pulled into the combustion
air intake installed above. This
type of installation can cause non
w a r r a n t a b l e p r o b l e m s w i t h
components and poor operation of
the unit due to the recirculation of
flue products.
Caution
!
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